Avoid translation problem
Avoid translation problem

Today's import failed again for zh-TW since the translator of a string
changed the order of the entries and then msgfmt complained with
"format specifications in 'msgid' and 'msgstr' for argument 1 are not
the same"

Use named arguments to allow translators to switch the order of the
entries.

Logfile:
https://jenkins.openstack.org/job/swift-propose-translation-update/179/console

Change-Id: Ide7480a8293a8439ce89d0ad22be74f1f0ad930c

tipabu/swift,nadeemsyed/swift,tipabu/swift,psachin/swift,notmyname/swift,nadeemsyed/swift,psachin/swift,williamthegrey/swift,clayg/swift,swiftstack/swift,nadeemsyed/swift,smerritt/swift,aerwin3/swift,matthewoliver/swift,matthewoliver/swift,tipabu/swift,openstack/swift,clayg/swift,hurricanerix/swift,psachin/swift,hurricanerix/swift,smerritt/swift,notmyname/swift,openstack/swift,smerritt/swift,matthewoliver/swift,revoer/keystone-8.0.0,redbo/swift,openstack/swift,larsbutler/swift,williamthegrey/swift,notmyname/swift,aerwin3/swift,larsbutler/swift,clayg/swift,notmyname/swift,matthewoliver/swift,hurricanerix/swift,psachin/swift,redbo/swift,prashanthpai/swift,nadeemsyed/swift,openstack/swift,swiftstack/swift,swiftstack/swift,clayg/swift,hurricanerix/swift,tipabu/swift,smerritt/swift,revoer/keystone-8.0.0,prashanthpai/swift